Typographic mold



Oct. 7. 1924.

F.- H. PIERPONT ET AL TYPOGRAPHIC MOLD Filed June 3, 1922 2 Sheets-Sheet 1 I2 I9 I R 1.

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UNITED STATES PATENT OFFICE.

FRANK HINMAN PIERPONT AND JOSEPH EARL TIPTON, OF SALFORDS, HORLEY, ENG- LAND, ASSIGNORS TO LANSTON MONOTYPE MACHINE COMPANY, OF PHILADEL- PHIA, PENNSYLVANIA, A CORPORATION OF VIRGINIA.

TYPOGRAPHIC MOLD.

Application filed June a, 1922. Serial no. 565,534.

T all whom it may concern:

Be it known that we, FRANK HINMAN PIERI-ONT and JOSEPH EARL Tir'roN, both citizens of the United States of America, residing at Salfords, Horley, in the county of Surrey, England, have invented certain new and useful Improvements in Typographic Molds; and we do hereby declare the following to be a full, clear, andexact description of the same, reference beinghad to the accompanying drawings, forming part of this specification, and to the characters of reference marked thereon.

This invention relates to typographic molds, that is, molds used in connection with suitable casting apparatus whereby elements of printers forms are produced and more particularly the invention relates to type composition molds which are equipped with split mold blades whereby low quads may be cast as well as type high and type shoulder high bodies. Molds of this general class are shown for example in United States Letters Patent 785,374: dated March 21, 1905, and 864,087 dated August 20, 1907,

it being understood that these molds are capable of being used in connection with suitable type casting machines or type casting and composing machines such asthose well known as marketed by Lanston Monotype Machine Company.

The main object of the present invention is to produce. a mold of simple construction whereby it may be readily manufactured and of such design and relation of its arts that it will'have a long wearing life. ther objects will hereinafter he specifically pointed out or will otherwise appear in connection with the following description of the invention as shown in the accompanying drawings in which,

Fig. 1 is a plan view of a low quad mold belonging to the class referred to and embodying the present invention,

Fig. 2 is a sectional View on approximately the line 22 of Fig.1,

Fig. 3 is a sectional view on approximate ly the line 3-3 of Fig. 1,

Fig. 4 is a sectional view on approximately the line 4-4 of Fig. 1,

Fig. 5 is an end elevation observed from the right-hand side of Fig. 1,

Fig. 6 is a plan view of the cross block showing particularly the lubricating channels therein,

Fig. 7 is a perspective view of the mold, the cross block being removed,

Fig. 8 is an enlarged view of a portion of a mold blade showing in exaggerated fashion the point block assembly and Fig. 9 is a cross section through the point block of Fig. 8.

The mold illustrated comprises a singlepiece base plate 10 having a lower horizontal portion 11 and upwardly projecting side pieces 12 and 13; the cross block 14 which is recipro-cated so that in one position itforms one wall of the mold cavity 15 and in another it allows for the ejection of the type from this cavity after casting; the side or type blocks 16 and 17 which form the two side walls of the mold cavity and between which is the mold blade comprising, as shown, the main blade or section 18 and the supplementary or out-ofi' blade or section 19, which blades when drawn back dimension the mold cavity set-wise and form the end wall of the cavity and when moved forward eject the type from the mold; the end blocks 20 and 21 which are secured by screws 22 to an intermediate supporting plate or water base 23 and between which end blocks the side blocks 16 and 17 are situated and supported; the gib 24 which is disposed between the cross block 14 and the side piece 13 of the base plate. The cross block 14 is provided with a back plate 25 in which is disposed a spring 26, (Fig. 2), one end of which bears against the body part of the block and the other nd against the cylindrical plate 27 in the back plate.

The cut-ofi' mold blade 19 is superposed upon the main blade 18 and both blades are arranged to be drawn back to dimension the mold cavity when full height type bodies are to be cast: when low quads or spaces are to be cast the upper or cut-off blade 19 is maintained in forward or closed position to shorten the mold cavity vertically while alignment.

the main or lower blade 18 is drawn back to dimension the cavity.

The mold blade is provided, in accordance with the present invention, with point blocks or distance pieces 28 which are of slightly greater thickness than the mold blade and which are located and anchored in apertures in the latter. To provide an unusually large bearing surface and to minimize any tendency of the mold blade to tilt and at the same time to maintain an unweakened construction of said blade, a plurality of distance pieces are preferably provided, there being shown three such pieces spaced apart and arranged somewhat in the form of a triangle. One of these point blocks is provided for the upper mold blade and two for the lower mold blade, as shown particularly in Fig. 2., The point blocks 28 are shown of circular form and are disposed each in an elongated opening 29 in the mold blade: they are conveniently prevented from falling out when the blades are removed from the mold by light spring wires 30 which rest in shallow grooves in the upper and lower walls of the openings 29 and pro ject into grooves formed around the cylindrical walls of the point blocks themselves. The opening 29 may be made slightly larger at one end, as shown in exaggerated fashion in Fig. 8, so that the point block may be inserted into the opening at that end, the ends of the wires 30 springing outward to rmit such assembling.

The blade is split horizontally and both sections are of the same thickness and are of uniform and unvarying thickness throughout, the lower surface of the cut-off blade 19 bearing upon the upper surface of the lower blade 18 without overlapping. The blade 19 is shorter than the blade 18 and the latter is provided with a shoulder 31 against which the upper blade 19 contacts when the forward ends of the blades are in Blades constructed in this fashion are obviously of maximum strength. and simplicity. The upper blade is provided with an opening 32 and the lower blade with a similar opening 33 through which project 1 stops 34 and 35 respectively (see Figs. 1, 2

and These separate stops one for each blade section are preferably formed or carried on a bracket 35 (Fig. 1), this bracket being secured in any suitable fashion to the 5 mold body. and act independently on their respective blades. It will be particularly observed that when the cut-off blade is forward for the purpose of producing a low quad and the main blade is moved to eject said low quad, the said main blade is stopped on its forward motion by the stop 35, and there is, therefore, no wearing down as formerly, of the shoulder 31. The provision of separate stops for the two blades thus results inthe production of. type. bodies which are not undercut as is the case in former molds when the shoulder 31 or its equivalent has become worn.

The blades 18 and 19 may be operated in the required manner by any suitable mechanism. In the drawings there is shown a lever 36 pivotally mounted and built into the mold body for operating the cut-off blade 19; this lever 36, as well as the main blade itself, may be operated by any of the usual well known mechanisms for this purpose.

The mold blades are held down by a spring or elastic pressure applied by a spring plate 37 which is secured to the end block 21 by a screw 38 (Figs. 1 and 7), and is furnished on its underside with a circular recess to receive the head of a screw 22 in the end block 21. The forward end of the plate 37 which rests upon the upper surface of the blade 19 is of reduced thickness and behind this reduced part the plate 37 bears upon a shoulder on the block 17 so that the plate 37 serves to hold down the side block 17 as well as the mold blade. The plate 37 is carried forward as near as possible to the casting cavity of the mold so as to apply the pressure as near as possible to the forward ends of the blade sections 18 and 19 where the tendency to rise is greatest, and is cut away at one corner 40, (Figs. 1 and 7) where the side blocks 16 and 17 and the upper blade 19 are of increased height to form a matrix seat around the casting cavity. The spring clamping plate 37 projects partly over but does not bear upon the side block 16 which latter is held down by a spring clamping plate 41, the reduced forward end of which has a beaded projection 42 which rests upon the side block 16. (Figs. 3 and 4). The plate 411 is secured to the end block by a screw 43 and has a recess 14- in its underside into which projects the head of the screw 22 in the end block 16. The spring clamping plate 37 is strong enough to exert a clamping action on the blades 18 and 19 and yet retain the necessary feature of elasticity so that the are maintained in proper relative position and allowed sufficient freedom of movement without the liability of particles of type metal accumulating between or beneath them. Similarly the side blocks 16 and 17 are held down under elastic pressure by the plates 41 and 37 respectively, thtis allowing the blocks to move relatively the mold base particularly under varying heat conditions, without interfering with their parallelism.

The side bearings for the cross block 14: are formed, as hitherto, by the gib 24; on the one side and on the opposite by the end blocks 20 and 21 and the side blocks 16 and 17. The two end blocks 20 and 21 erasecured to the intermediate supporting plate 23 by screws and the block 20 has on its 1111* derside a rib which fits into a groove 45 in the intermediate plate 23, (Figs. 3 and 4).

The two side blocks 16 and 17 which are disposed between the end blocks 20 and 21 are clamped together with the mold blades between them, the block 16 being positioned by two adjusting screws 46 in the block 20 and the block 17 being pressed yieldingly toward the block 16 by a block 47 which is situated in an opening in the end block 21 and is pressed against the side block 17 by a spring 48. The pressure exerted by this spring can be adjusted by means of a screwed sleeve 49 and a screw cap 50. The side blocks 16 and 17 are not in fixed contact with the mold body but are suspended between the three points 46, 46 and 47 and parallelism between those portions of the walls of the side blocks which form walls of the casting cavity 15 is insured and, niorever. distortions of the supporting plate 23 or of the mold base plate 10 due to heat or other causes will not adversely affect the form of the casting cavity. To provide for the adjustment of the side blocks 16 and 17 relatively to the cross block 14. there are provided centering pins 51 and 52 which are rotatably mounted in openings in the base plate portion 11 and in the intermediate plate 23, (Fig. 4), and are furnished with eccentric portions which project upwardly into grooves 53 and 54 in the undersides of the blocks 16 and 17 respectively. These pins 51 and 52 are conveniently retained in position by set screws extending horizontally through a portion of the supporting plate 23. The grooves 53 and 54 in the side blocks 16 and 17 extend cross-wise therein so that said blocks can move in a diretien paral el to the motion of the cross block thereby preventing any inequalities of temperature in various parts of the mold from distorting or adversely affecting the parallelism of the walls of the casting cavity 15.

By the means above described the parts 16, 17, 18 and 19 while free to move relatively to the mold body under various temperature conditions and possible distortions of the mold nevertheless retain their proper relative positions and maintain the parallelism f the mold cavity walls and the accurate dimensions of said cavity.

Projecting from the intermediate or supporting plate 23 is an extension 55, (Figs. 1, 2 and 5). which provides a comparatively long bearing for the mold blade and tends to avoid tilting and excessive wear thereof.

For adjusting the cross block there are provided screws 56 threaded in openings in the upwardly extending portion 13 of the base plate, the ends of these screws engaging with the gib 24. When properly posi tioned the locking rings 57 are screwed upon the screws 56 until they come against the portion 13 or a recess cut therein. The cutaway corner 58 of the block 20 shown particularly in Fig. 7, is provided as a clearance cut so that the type when ejected and removed from the mold by the carrier will not be injured.

To provide for an adequate and steady supply as well as an equal distribution of lubricant, two main supply channels are provided to which a suitable lubricator or oil cup can be attached. hie supply tube from the lubricator is attached to or cured in the cap (Figs. 3 and 7), and the lubricant passes through the opening 59 therein into the chamber in which the spring 48 is situated, and through an opening 60, (Fig. 3) in the block 47 to a passage 61 in the side block 17 thereby reaching the mold blades 18 and 19. One or more small opeu ings may be cut in the upper surface of the mold blade 19 to allow the lubricant to pass and lubricant distributing channels 62. (Fig. 2) are cut either on the sides of the blocks 16 and 17 or in the sides of the blades 18 and 19. Some of the lubricant in the chamber for the spring 48 passes by a conduit 63 (Figs. 1 and 7), in the end block 21 to the front of said block to supply lubricant to the adjacent face of the cross block 14.

Another supply tube from the lubricator enters the end piece 13 of the mold base by an opening 64 (Figs. 1 and 7), and the lubricant passes therefrom through an opening 65 in the gib 24 (Fig. 1), where it is distributed between the meeting surfaces of the gib and the cross block. In the back plate of the cross block there are two conduits 66 and (37 (Fig. 6). of which the con duit 66 communicates with a conduit 68 in the body of the cross block. which conduit 68 terminates near the coupling hook 69 for the type carrier or other member which operates the cross block 14. The conduit 67 communicates with a conduit 70 in the body of the cross block which conduit 70 opens into a slot in which the jet pusher 71 (Fig. 2) is situated and moved relatively to the cross block 14 b 7 the can: groove 72. The lubricant from the conduit 70 lubricates the jet pusher 71, the walls of the chamber being furnished with distribi'iting channels 73, (Fig. 2). Another lubricant conduit 74 leads from the conduit 70 to the front of the cross block and supplies lubricant between the rubbing faces of the cross block and the side and end blocks of the mold. At the upper end of the cross block adjacent to the back plate there is cut a groove, 75 (Fig. 6) which prevents lubricant from reaching to the top of the mold and from that point coming into contact with the matrices.

eclaim:

1. In a typographic mold provided with type blocks, a sectional mold blade mounted to slide therebetween and a supporting l l O lit) block, and in combination therewith separate forward stops for the mold blade sections, a spring pressure device for yieldably holding said type blocks and said blade in contact with said supporting block, point blocks each located in an aperture in the mold blade and means for securing each block in the aperture therefor.

2. in a typographic mold provided with type blocks, a mold blade slidable therebetween and a supporting block, the combination of a point block carried by said blade and extending hrough an opening therein to contact with said type blocks and a spring plate contacting with the top of said blade and acting to press it yieldably against said supporting block.

3. A typographic mold construction comprising a mold blade having an opening therein, a point block in said opening and means for securing the point block to said blade.

4. A typographic mold embodying a support, type blocks mounted thereon, a low quad mold blade mounted to slide on said support and between said blocks. said blade comprising a main blade or section and an upper blade or section, the latter mounted to slide upon the upper edge of said main blade, both blades being of the same unvarying thickness throughout and being provided with individual stop openings, and a stop mounted on a fixed portion of the mold and extending through each of said blade openings.

A. typographic mold embodying a horizontal support, type and cross blocks, mounted thereon, a mold blade slidahly mounted between said type blocks, spring mechanism tending to squeeze the blade between said type blocks, and point blocks carried by said blade and being slightly thicker than the blade to take the squeeze produced by the type blocks and prevent the blade from sticking. and spring plates to yieldingly press said type blocks and said blade against said support.

6. reciprocatory mold blade for typographic molds, provided with a transverse opening and in combination therewith a point block, and means for detachably securing the point block Within the opening in the blade.

7. A reciprocatory mold blade for typographic molds, provided with an elongated transverse opening and in combination therewith a point block located in said opening and means between said point block and the Walls of the opening for detachably securing the point block to the blade.

8. A typographic mold comprising type blocks, main and supplemental mold dimensioning blades each provided with an opening, a series of independent point blocks. or distance or gage pieces each in one of said openings to form a relatively large bearing surface for said type blocks, and means for clamping said point blocks between said type blocks, the mold blade being slidably held between the latter.

9. A typographic mold comprising a sup port, type blocks mounted thereon, main and supplemental mold blades each provided with an opening, a plurality of separate point blocks or distance pieces each in one of said openings, means for clamping said point blocks between said type blocks, the mold blade being slidably held between the latter, and an elastic clamping plate bearing upon the supplemental mold blade to hold both blades down by yielding pressure against said support.

it). A typographic mold comprising type blocks, main and supplemental mold blades of the same unvarying thickness throughout, the supplemental blade being provided with an opening and the main blade with a plurality of openings. point blocks or dis' tance pieces. one in each of said blade openings whereby a relatively large bearing surface for said type block's provided, and means for clamping said point blocks between said type blocks, the mold blade being slidably held between the latter.

FRANK HINMAN PIERPONT. JOSEPH EXRL TIPTON. 

